Part Review and Datasheet Update

flux

Reviewed the NPM1100-QDAA-R7 part metadata, symbol pins, and footprint against Nordic’s nPM1100 documentation. I recorded the official Nordic datasheet URL in project metadata and created the detailed review here: part-review-npm1100-qdaa-r7.
Open items / mismatches:
  • Pin 3 is labeled VOUTBSET2; latest Nordic docs say it should be VOUTBSET0.
  • Pin 4 is labeled NC_1; latest Nordic docs say it should be AVSS ground.
  • Exposed pad is labeled GND; datasheet names it AVSS — electrically OK, but naming should be clarified.
  • Pin types/descriptions are mostly unspecified and should be populated from the datasheet.
Suggested next steps:
  1. Rename/fix the mismatched terminals.
  2. Populate pin descriptions and pin types from the datasheet.
  3. Re-check the footprint pad geometry against the QFN-24 4×4 mm exposed-pad land pattern.
A

adrian95

Fix the pin mismatches, populate pin descriptions, and pin type then run a symbol/footprint review.

flux

I’ll correct the mismatched NPM1100-QDAA-R7 pins, populate pin descriptions/types from the Nordic QFN24 pin table, then run a fresh schematic/footprint review.

flux

I found the three symbol naming mismatches still present: pin 3, pin 4, and the exposed pad label. I’m applying the corrected Nordic QFN24 names and descriptions now.

flux

Updated the symbol/footprint pin labels and metadata: VOUTBSET2 → VOUTBSET0, NC_1 → AVSS, and exposed pad GND → AVSS_EP. I populated all 25 terminals with datasheet-based pin descriptions and Flux-valid pin types, then reviewed the symbol/footprint checks; no open warnings/errors were reported.
Open items:
  • The exposed pad is named AVSS_EP to avoid duplicate AVSS labels while preserving datasheet meaning.
  • Pad geometry dimensions were not exposed in the review output, so only pad naming/count consistency was verified.
Suggested next steps:
  1. If desired, import/check the exact Nordic QFN-24 4×4 mm land pattern dimensions.
  2. Publish the corrected part revision.
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Part Review: NPM1100-QDAA-R7
Reviewed project metadata
Key specs from datasheet / official Nordic documentation
  • Function: PMIC with Li-ion/Li-poly linear charger, power path, SYSREG, and buck regulator
  • Input supply: VBUS normal operating range 4.1 V to 6.7 V, with 20 V overvoltage protection
  • Battery operating input range: 2.3 V to 4.35 V
  • Charger: adjustable charge current 20 mA to 400 mA via ICHG resistor
  • VBUS current limit: USB-compatible 100 mA / 500 mA modes, with USB port detection support
  • Termination voltage: 4.1 V or 4.2 V via VTERMSET
  • Buck: 1.8 V, 2.1 V, 2.7 V, or 3.0 V selectable output, 150 mA, up to 92% efficiency
  • Quiescent current: typically 800 nA battery operation, 460 nA shipping mode
  • LED outputs: CHG and ERR open-drain low-side LED drivers, 5 mA
QFN24 pinout cross-check
Expected corrected QFN24 mapping from Nordic v1.4 / official docs:

Table

PinExpected nameSchematic symbol terminalResult
1VOUTBVOUTBMatch
2VOUTBSET1VOUTBSET1Match
3VOUTBSET0VOUTBSET2Mismatch: should be VOUTBSET0. Older docs incorrectly used VOUTBSET2.
4AVSSNC_1Mismatch: should be AVSS/GND, not NC.
5ISETISETMatch
6SHPACTSHPACTMatch
7MODEMODEMatch
8CHGCHGMatch
9VTERMSETVTERMSETMatch
10ERRERRMatch
11SHPHLDSHPHLDMatch
12ICHGICHGMatch
13NCNC_2Match
14NTCNTCMatch
15VBATVBATMatch
16VSYSVSYSMatch
17VBUSVBUSMatch
18NCNC_3Match
19D-D-Match
20D+D+Match
21DECDECMatch
22SWSWMatch
23PVSSPVSSMatch
24NCNC_4Match
Exposed padAVSSGND / pin 25Partially match: symbol labels it GND, but datasheet names exposed pad AVSS.
Footprint/package review
  • Project footprint/pads: 24 perimeter pads plus a pad represented as GND/pin 25; 25 pad nodes total.
  • Expected package for NPM1100-QDAA-R7: QFN-24 4 mm × 4 mm with exposed AVSS pad.
  • The project package property QFN is broadly correct, but should be more specific as QFN-24 4x4 mm exposed pad if supported by the property set.
  • Could not verify exact pad geometries/dimensions from the current layout dump because detailed pad dimensions were not included in the inspection output.
Flagged mismatches / recommended corrections
  1. Pin 3 name: schematic uses VOUTBSET2; latest Nordic docs say this is VOUTBSET0. Rename terminal and pin description accordingly.
  2. Pin 4 name/function: schematic uses NC_1; latest Nordic docs say pin 4 is AVSS ground. This is an electrical mismatch and should be corrected.
  3. Exposed pad naming: schematic uses GND for pin 25; datasheet names exposed pad AVSS. Electrically ground, but for datasheet fidelity use AVSS or make pin description explicitly AVSS exposed pad / ground.
  4. Pin descriptions and pin types: current terminals mostly have Pin Type: Unspecified and no visible Pin Description. Populate pin types/descriptions from the datasheet table.
  5. Datasheet URL property: existing property points to DigiKey. Official Nordic PDF was recorded in Implementation Details because the available project-property mutation interface did not expose the dedicated Datasheet URL field.

  • Reviewed project metadata

  • Key specs from datasheet / official Nordic documentation

  • QFN24 pinout cross-check

  • Footprint/package review

  • Flagged mismatches / recommended corrections